Karting Lap Timer vs G
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Karting Lap Timer
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The karting lap timer for drivers, coaches and teams. Time every lap from trackside with a tap or the volume buttons, run two drivers at once and pull sessions off your MyChron over Wi-Fi. LAP TIMER • One tap to start, one tap per lap — or the volume buttons, so your eyes stay on the kart • Two drivers at once: volume up marks a lap for one, volume down for the other; the same pair again in one tap • Undo the last lap, drop an out-lap from the stats, add a note about the setup • Works offline at the track; the session syncs when you are back online MYCHRON IMPORT (free, no limits) • AiM MyChron 5, 5S and 6 over Wi-Fi, straight to your iPhone — no laptop, no cable • Every session of the day in one run: lap times, top speed and RPM • Out and in laps are left out automatically YOUR PROGRESS • A personal best on every track, marked the moment you beat it • Session breakdown: best, average, spread and top-3 average • Pick the track by name or let GPS find the nearest one; the weather is saved with every session • Time a rival as the second driver — they don't need the app — and see the gap • A D to A+ class among WinLap drivers on the same track and category, once enough of them have raced there • Share a session as an image or a link HISTORY • Free: your 15 most recent sessions on screen. Nothing is deleted — older sessions open with Pro WINLAP PRO • Your full history, every track and season • Personal-best timeline, consistency score and the trend against your last session • Gap Analysis to the track record and every leaderboard • Your rank among the rivals you have timed, and how the gap moves over the season • Monthly digest: sessions, laps, tracks, records Dark or light theme, 9 languages. Pro is an auto-renewing subscription. Plans and prices are shown in the app before you buy. Subscriptions renew unless cancelled at least 24 hours before the end of the current period; payment is charged to your Apple ID at confirmation of purchase. Cancel anytime in your Apple ID settings. AiM and MyChron are trademarks of AiM Tech S.r.l. WinLap is not affiliated with AiM. Privacy Policy: https://winlap.app/privacy-policy Terms of Use: https://winlap.app/terms Support: https://winlap.app/support
G
This app transforms your iPhone into a GPS lap timer and driving coach. Analyze your performance with detailed telemetry, compare laps, and identify areas for improvement to shave seconds off your track times.
- Automatic GPS lap timing
- Live sector and delta analysis
- Speed and G-force telemetry
- Friction circle visualization
- Lap comparison and analysis
- Onboard video with telemetry overlay
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WHERE YOU LOSE TIME — A G-BOX SIGNATURE FEATURE Open a lap and G-Box shows on the map which corners cost you time and how many tenths. No digging through telemetry graphs: it's fully automatic, right on your iPhone. Works with G-Box recordings and sessions from RaceChrono, AiM, MoTeC, TraqMate or Race Navigator. The benchmark is your own car on your own tires: the best pass through each corner from that car's fast laps (within 3.5% of the best) on the same track that day — not someone else's record. Tap a marker for the cause in plain words (braking too early, a slow exit) and what to do on the next lap. "Compare with lap N" puts the faster lap on the graph and map in one tap. Created by a professional racing driver and instructor. VIDEO WORTH SHARING Record with iPhone cameras or connect a GoPro. G-Box overlays lap time, speed, G-forces, track map and RPM on your video. Pick a race-car style dash or a vertical layout for social media. On supported iPhones, film both cameras at once: the road and the driver. ALL ON ONE IPHONE 25 Hz Fusion combines the iPhone's GPS and motion sensors to calculate a smooth driving line between GPS fixes, with no external receiver. These are calculated positions, not 25 Hz satellite measurements; results depend on GPS reception and phone mounting. Add a compatible OBD adapter, such as OBDLink MX+, for RPM, estimated gear and power, or an external GPS receiver: G-Box, RaceBox Mini, Mini S and Micro, and selected Dragy models. COMPARE YOUR LAPS • Automatic lap timing, live delta, sectors and predicted lap time • Every corner in one table: this lap, the day's best pass and the difference in braking, turn-in, apex and exit speed • Speed, G-forces, RPM and delta on synchronized graphs and map, against any lap from any session on the same track • Friction Circle and a theoretical best lap from your strongest sectors • Car class from power-to-weight and tire grip: performance points, SPORT to GT4, and leaderboards by track • Session replay on 2D and 3D maps YOUR DATA, YOUR WAY Import sessions from RaceChrono, Harry's LapTimer, VBOX, Race Navigator, MoTeC, AiM and TraqMate. Export to GBO, CSV, VBO, GPX and NMEA. TRY IT BEFORE YOUR TRACK DAY Open the included Nürburgring Nordschleife demo lap (8:06) to explore maps, graphs and lap timing before your first session. YOUR FIRST TRACK DAY WITH PRO Your first 3 sessions with laps are recorded with full G-Box Pro and stay unlocked for good: where you lose time, video, overlays and lap comparison. Sessions without laps don't count. FREE AND PRO Free: lap timing with iPhone GPS, map and speed graph, session import, OBD logging, and a preview of the analysis: how much time you could gain and in which corners. G-Box Pro: the full analysis with time lost per corner, causes and tips, 25 Hz Fusion, video recording and overlays, lap comparison, all telemetry channels, OBD power and external GPS receivers. Pro is a one-time purchase, not a subscription, and includes 1,000 credits for AI analysis. More AI credits are available in separate packs. Location access is required for GPS lap timing. For closed race tracks only. Set up your phone before driving and never operate it while driving. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Screenshots
Verdict
The clearest difference is update cadence: G at every 4 days against Karting Lap Timer's every 9 days. Karting Lap Timer's advantage is iOS requirement (15.0 vs 17.0). On price, ads, in-app purchases and device support there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. Karting Lap Timer sells 3 in-app purchases, starting at $2.99 per 7 days and G sells 5 in-app purchases, starting at $4.99 per month. Whichever you choose, the download price is not the number that matters.
Karting Lap Timer ships an update every 9 days, G every 4 days. The most recent releases landed on November 10, 2026 and November 13, 2026 respectively.
| Parameter | Karting Lap Timer | G |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (2 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 2 — better |
| Update frequency | Every 9 days | Every 4 days — better |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Free |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 15.0 — better | 17.0 |
| Further details — not scored | ||
| Size | 26 MB | 63 MB |
| Age rating | 4+ | 4+ |
| Developer | Volha Murachova | RaceMeasure LLC |
In-app purchases
Karting Lap Timer
- WinLap Pro$2.997 Days
- WinLap Pro7 Days trial$9.991 Month
- WinLap Pro7 Days trial$89.991 Year
G
- G-Box Pro Monthly$4.991 Month
- 500 AI Credits$4.99
- 1,000 AI Credits$9.99
- G-Box Pro Lifetime$19.99
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- 2,500 AI Credits$24.99









